Ether lubricants from fatty acids

ABSTRACT

Long chain ether compositions may comprise at least one long chain ether of general Formula I: 
     
       
         
         
             
             
         
       
     
     wherein R 1 ′ and R 2 ′ are independently selected from C 5 -C 21  linear or branched alkyl and C 5 -C 21  linear or branched alkenyl, and R 1 ′ and R 2 ′ are the same or different, and R is selected from linear or branched alkyl having up to 52 carbon atoms and linear or branched alkenyl having up to 52 carbon atoms. In an embodiment, long chain ether compositions of matter such as those disclosed herein may find applications as lubricants.

TECHNICAL FIELD

This disclosure relates to processes for producing ether lubricants fromfatty acids and to long chain ether compositions.

BACKGROUND

Some phenyl ethers have in the past been used as lubricants, but thesetypically have fairly high pour points and are not generally applied.

There is a need for long chain ether compositions for use as lubricants,and for processes for efficiently producing long chain ether lubricantsfrom fatty acids or related feedstocks.

SUMMARY

In an embodiment there is provided a composition comprising a long chainether of general Formula I:

wherein R₁′ and R₂′ are independently selected from the group consistingof C₅-C₂₁ linear or branched alkyl and C₅-C₂₁ linear or branchedalkenyl, R₁′ and R₂′ are the same or different, and R is selected fromthe group consisting of linear or branched alkyl having up to 52 carbonatoms and linear or branched alkenyl having up to 52 carbon atoms.

In another embodiment there is provided a composition comprising a longchain ether of general Formula IV:

wherein R₁′ and R₂′ are independently selected from the group consistingof C₅-C₂₁ linear or branched alkyl and C₅-C₂₁ linear or branchedalkenyl, R₁′ and R₂′ are the same or different, R₄ and R₅ areindependently selected from the group consisting of C₁-C₂₁ linear orbranched alkyl and C₂-C₂₁ linear or branched alkenyl, and R₄ and R₅ arethe same or different.

In a further embodiment there is provided a composition comprising along chain ether of general Formula V:

wherein R₁′ and R₂′ are independently selected from the group consistingof C₅-C₂₁ linear or branched alkyl and C₅-C₂₁ linear or branchedalkenyl, R₁′ and R₂′ are the same or different, R₆ is selected from thegroup consisting of C₁-C₄₀ linear or branched alkyl, and R₇, R₈, and R₉are independently selected from the group consisting of a hydrogen atomand C₁-C₂₂ linear or branched alkyl.

DETAILED DESCRIPTION

Conventional processes for preparing alcohols with a carbon chain lengthabove that of available fatty acids are expensive. Also, suchconventional processes place the alcohol group toward the end of themolecule. Also for lubricant applications, it may be important toprepare molecules with a sufficiently high boiling point and viscosityto meet specifications for most lubricant products. This typicallyrequires carbon chains considerably longer than the C₁₆-C₁₈ chains thatare made simply by hydrogenation of the most commonly available fattyacids and fatty oil feedstocks.

Applicant has demonstrated a new route to make long chain secondaryalcohols, from fatty acids and fatty oils, in which the OH group may beplaced non-terminally in the molecule and in which the carbon chainlength is about twice (2×) the length of the carbon chain of alcoholsprepared by simple hydrogenation of fatty acids and fatty oils.Furthermore, Applicant has discovered that long chain ethers may beprepared from the long chain secondary alcohols via a number ofdifferent routes. Such long chain ethers may find applications aslubricants.

Catalysts for Ketonization

In an embodiment, a suitable catalyst for ketonization may comprisealumina. In an embodiment, the ketonization catalyst may comprise atleast 95 wt %, at least 99 wt %, or at least 99.5 wt % alumina. In anembodiment, the fresh ketonization catalyst may be calcined at atemperature in the range from 700 to 1100° F. (371 to 593° C.) for atime period in the range from 0.5 to 24 hours prior to contacting theketonization catalyst with a reactant (long chain carboxylic acid orfatty acid). In an embodiment, the fresh ketonization catalyst may becalcined in the presence of steam. In an embodiment, the ketonizationcatalyst may comprise gamma alumina. In an embodiment, the ketonizationcatalyst may consist essentially of alumina.

In an embodiment, the surface area of the alumina catalyst forketonization may be in the range from 15 to 500 m²/g of catalyst, orfrom 50 to 400 m²/g of catalyst, or from 100 to 250 m²/g of catalyst. Inan embodiment, an alumina catalyst useful for ketonization reactions asdisclosed herein may have various shapes including, for example,granules, pellets, spheres, extrudates, and the like. The aluminacatalyst may be disposed within a ketonization zone. A ketonization zoneis not limited to any particular reactor type. For example, aketonization zone may use a fixed-, fluidized-, or moving bed reactor.

Over time, the ketonization catalyst may passivate and lose activity. Analumina catalyst that has become passivated to varying degrees followingketonization may be regenerated, e.g., as described in commonly assignedU.S. patent application Ser. No. ______, filed on even date herewith andentitled Ketonization process using oxidative catalyst regeneration(Atty. Docket No. T-9577).

Fatty Acid Ketonization

A ketone product may be prepared by contacting at least one fatty acidwith a ketonization catalyst in a ketonization zone under ketonizationconditions according to the following scheme (Scheme 1), wherein R₁ andR₂ are saturated or unsaturated aliphatic groups, and wherein R₁ and R₂may be the same or different. As a non-limiting example, R₁ and R₂ maybe independently selected from C₅-C₂₁ linear or branched alkyl andC₅-C₂₁ linear or branched alkenyl.

In a sub-embodiment, R₁ and R₂ may be independently selected from C₇-C₁₇linear or branched alkyl or alkenyl, or from C₉-C₁₇ linear or branchedalkyl or alkenyl, or from C₉-C₁₅ linear or branched alkyl or alkenyl, orfrom C₁₅-C₁₇ linear or branched alkyl or alkenyl. In an embodiment,ketonization may also be known as ketonic decarboxylation or fatty aciddecarboxylation-coupling.

In an embodiment, the step of contacting the at least one fatty acidwith the ketonization catalyst may comprise feeding a feedstockcomprising the at least one fatty acid to the ketonization zone. In anembodiment, feedstocks for ketonization as disclosed herein may bederived from a triglyceride-containing biomass source such as oils orfats from plants and/or animals. In an embodiment, the feedstock may beobtained from biological material (e.g., fatty biomass) having a lipidcontent greater than (>) 30 wt % on a dry weight basis, or >50, or >70,or >90, or >95, or >99 wt % on a dry weight basis. In an embodiment, thebiological material may comprises vegetable oil, animal tallow, algae,and combinations thereof. In an embodiment, the fatty acid feedstock maybe derived from other, non-biomass, sources (e.g., Fischer-Tropschsynthesis). Such alternatively derived fatty acids may be mixed orblended with biomass derived fatty acids prior to ketonization, e.g., toalleviate logistical and/or supply related issues involving biomass.

In an embodiment, feedstocks for ketonization may comprise at least onefatty acid reactant or a mixture of fatty acid reactants. In anembodiment, the at least one fatty acid reactant for ketonization maycomprise a mixture of at least two (2) fatty acids. In an embodiment,reactants for ketonization may comprise C₆-C₂₂ fatty acids and/or C₆-C₂₂fatty acid derivatives. In an embodiment, such fatty acid derivativesmay include C₆-C₂₂ fatty acid mono-, di-, and triglycerides, C₆-C₂₂ acylhalides, and C₆-C₂₂ salts of fatty acids. In a sub-embodiment, the fattyacids and/or fatty acid derivatives for ketonization may be in the rangefrom C₈-C₁₈, or in the range from C₁₆-C₁₈. In an embodiment, at leastone fatty acid for ketonization may be obtained from biologicalmaterial, including various organisms and biological systems. In anembodiment, the at least one fatty acid may be obtained from at leastone naturally occurring triglyceride, for example, wherein thetriglyceride may be obtained from biomass. In an embodiment, feedstocksfor ketonization may comprise at least 95 wt % fatty acids or at least99 wt % fatty acids.

In an embodiment, reactants for ketonization may be derived from one ormore triglyceride-containing vegetable oils such as, but not limited to,coconut oil, corn oil, linseed oil, olive oil, palm oil, palm kerneloil, rapeseed oil, safflower oil, soybean oil, sunflower oil, and thelike. Additional or alternative sources of triglycerides, which can behydrolyzed to yield fatty acids, include, but are not limited to, algae,animal tallow, and zooplankton.

In an embodiment, reactants for ketonization may include, withoutlimitation, C₈-C₂₂ fatty acids, and combinations thereof. Examples ofsuitable saturated fatty acids may include, without limitation, caproicacid (C₆), caprylic acid (C₈), capric acid (C₁₀), lauric acid (C₁₂),myristic acid (C₁₄), palmitic acid (C₁₆), stearic acid (C₁₈), eicosanoicacid (C₂₀). Examples of unsaturated fatty acids may include, withoutlimitation, palmitoleic acid, oleic acid, and linoleic acid. Reactantsfor ketonization may further include, without limitation, palm kerneloil, palm oil, coconut oil, corn oil, soy bean oil, rape seed (canola)oil, poultry fat, beef tallow, and their respective fatty acidconstituents, and combinations thereof.

In an embodiment, the reactants for the ketonization reaction or stepmay be hydrogenated to substantially saturate some or all of the doublebonds prior to ketonization. In cases where the fatty oils, i.e.triglycerides, are hydrolyzed to fatty acids, such saturation of thedouble bonds may be done before or after the hydrolysis.

In some aspects, wherein the above-mentioned hydrolyzed triglyceridesources contain mixtures of saturated fatty acids, mono-unsaturatedfatty acids, and polyunsaturated fatty acids, one or more techniques maybe employed to isolate, concentrate, or otherwise separate one or moretypes of fatty acids from one or more other types of fatty acids in themixture (see, e.g., U.S. Pat. No. 8,097,740 to Miller).

Prior to contacting the reactant with the ketonization catalyst in theketonization zone, the ketonization catalyst may be calcined. In anembodiment, the step of calcining the ketonization catalyst may beperformed in the presence of steam. In an embodiment, the step ofcalcining the ketonization catalyst may be performed at a temperature inthe range from 400 to 600° C., or from 450 to 500° C., for a time periodin the range from 0.5 to 10 hours, or from 1 to 2 hours.

In an embodiment, a suitable catalyst for fatty acid ketonization maycomprise alumina. In an embodiment, the ketonization catalyst maycomprise substantially pure gamma alumina. In an embodiment, theketonization catalyst may consist essentially of alumina.

Suitable ketonization conditions may include a temperature in the rangefrom 100 to 500° C., or from 300 to 450° C.; a pressure in the rangefrom 0.5 to 100 psi, or from 5 to 30 psi; and a liquid hourly spacevelocity (LHSV) in the range from 0.1 to 50 If′, or from 0.5 to 10 h⁻¹.In an embodiment, the partial pressure of the fatty acid in theketonization zone may be maintained in the range of 0.1 to 30 psi. Theketonization process can be carried out in batch or continuous mode,with recycling of unconsumed starting materials if required.

In an embodiment, the decarboxylation reaction may be conducted in thepresence of at least one gaseous- or liquid feedstock diluent. In anembodiment, the ketonization reaction may be carried out while the fattyacid is maintained in the vapor phase. Conditions for fatty acidketonization are disclosed in commonly assigned U.S. patent applicationSer. No. 13/486,097, filed Jun. 1, 2012, entitled Process for producingketones from fatty acids. In an embodiment, a fatty acid reactant forthe ketonization reaction may comprises a mixture of at least two (2)fatty acids such that the ketone product may comprise a mixture of atleast three (3) different long chain ketones, each of which may beselectively hydrogenated to provide a mixture of at least three (3)different long chain secondary alcohols.

In an embodiment, the long chain ketones provided by the ketonizationreaction can be separated from by-products (such as oligomeric orpolymeric species and low molecular weight “fragments” from the fattyacid chains) by distillation. For example, in an embodiment the crudereaction product can be subjected to a distillation-separation atatmospheric or reduced pressure through a packed distillation column. Inan embodiment, the ketonization product may be a wax under ambientconditions.

The long chain ketones produced from fatty acids, e.g., as disclosedhereinabove, may be converted to their corresponding long chainsecondary alcohol by selective ketone hydrogenation over a selectiveketone hydrogenation catalyst, e.g., as disclosed hereinbelow.

Catalysts for Selective Ketone Hydrogenation

A catalyst for the selective hydrogenation of long chain ketones to thecorresponding secondary alcohols may be referred to herein as a“selective ketone hydrogenation catalyst.” In an embodiment, theselective ketone hydrogenation catalyst for selective hydrogenation oflong chain (e.g., C₁₁+) ketones may comprise a metal selected from Pt,Pd, Ru, Ni, Co, Mo, Cr, Cu, Rh, and combinations thereof. In anembodiment, the selective ketone hydrogenation catalyst may furthercomprise a support material. In an embodiment, the support material maybe selected from carbon, silica, magnesia, titania, and combinationsthereof. In an embodiment, at least some metal component(s) of thehydrogenation catalyst may be in elemental form. As a non-limitingexample, the hydrogenation catalyst may comprise a metal selected fromPt, Pd, Ru, Ni, Rh, and combinations thereof, and the metal may be inelemental form in the hydrogenation catalyst. In a sub-embodiment, thehydrogenation catalyst may comprise a metal selected from Pt, Pd, andcombinations thereof, and a support material comprising carbon, silica,magnesia, titania, and combinations thereof. In an embodiment, thehydrogenation catalyst may be unsupported meaning, for example, that themetal may be present either in finely divided form (e.g., as metalpowder) or in pelletized or extruded or other structural form withoutthe presence of a support material.

In an embodiment, the selective ketone hydrogenation catalyst lacks, oris devoid of, any component that promotes the dehydration of alcohols,such that the hydrogenation catalyst as a whole lacks catalytic activityfor dehydration of the long chain secondary alcohol, under theconditions used for the selective hydrogenation of long chain ketones,such that ketone conversion to the corresponding alkene or alkane isprevented. Because the long chain ketones as disclosed herein exhibitcomparatively low reactivity in the ketone hydrogenation reaction, e.g.,in comparison with C₃ or C₄ ketones, more forcing conditions may berequired for hydrogenation as compared to hydrogenation of lighterketones; such (more forcing) conditions would be expected to exacerbatethe negative effect on product selectivity of a hydrogenation catalysthaving dehydration functionality. This highlights the significance ofusing a selective ketone hydrogenation catalyst, in processes asdisclosed herein, for the efficient conversion of long chain ketones tothe corresponding long chain secondary alcohols in high yield.

In an embodiment, a selective ketone hydrogenation catalyst will lackalumina. As an example, the selective ketone hydrogenation catalyst maybe prepared without the use of an alumina component and with a supportmaterial, if any, lacking an alumina component, such that the selectiveketone hydrogenation catalyst contains at most only trace amounts ofalumina that are insufficient to be catalytically effective indehydrating long chain secondary alcohols under the hydrogenationconditions as disclosed herein for the selective hydrogenation of longchain ketones to the corresponding secondary alcohols.

This is in stark contrast to conventional hydrotreating catalysts havingalumina support material that is the major catalyst component by weightand volume. Applicant has observed that the presence of alumina, e.g.,in conventional hydrotreating catalysts, negatively impacts theconversion of long chain ketones to the corresponding secondary alcoholproduct(s) as disclosed herein.

In an embodiment, the surface area of the hydrogenation catalyst may bein the range from 15 to 1000 m²/g of catalyst, or from 100 to 600 m²/gof catalyst, or from 250 to 450 m²/g of catalyst. In an embodiment aselective ketone hydrogenation catalyst, useful for selectivehydrogenation of long chain ketones as disclosed herein, may havevarious shapes including, for example, powder, granules, pellets,spheres, extrudates, and the like. The selective ketone hydrogenationcatalyst may be disposed within a ketone hydrogenation zone or ketonehydrogenation reactor. The ketone hydrogenation zone is not limited toany particular reactor type.

Long Chain Secondary Alcohols by Selective Hydrogenation of Long ChainKetones

As described hereinabove, a long chain ketone may be prepared, e.g.,according to Scheme 1 by contacting at least one fatty acid with aketonization catalyst in a ketonization zone under ketonizationconditions. The long chain ketone may then be selectively hydrogenatedby contacting the long chain ketone with a selective ketonehydrogenation catalyst in a ketone hydrogenation zone under selectiveketone hydrogenation conditions according to the following Scheme 2 toprovide a long chain secondary alcohol.

In Schemes 1 and 2, R₁ and R₂ may be the same or different, R₁ and R₂may be independently selected from C₅-C₂₁ linear or branched alkyl andC₅-C₂₁ linear or branched alkenyl, wherein: when R₁ is alkyl R₁′═R₁,when R₂ is alkyl R₂′═R₂, when R₁ is alkenyl R₁′ is alkyl or alkenyl,when R₂ is alkenyl R₂′ is alkyl or alkenyl, and wherein R₁ and R₁′ havean equal number of carbon atoms, and R₂ and R₂′ have an equal number ofcarbon atoms. In an embodiment, R₁′ and R₂′ may be independentlyselected from C₇-C₁₇ linear or branched alkyl, or from C₉-C₁₇ linear orbranched alkyl, or from C₉-C₁₅ linear or branched alkyl, or from C₁₅-C₁₇linear or branched alkyl.

While not being bound by theory, in an embodiment wherein R₁ and R₂ arealkenyl, the product alcohol may be the corresponding saturated alcohol,since alkenyl group hydrogenation is typically more facile than ketonehydrogenation. As an example, when R₁ is alkenyl R₁′ may be alkyl, andwhen R₂ is alkenyl R₂′ may be alkyl. In a sub-embodiment, R₁′ and R₂′may be independently selected from the group consisting of C₅-C₂₁ linearor branched alkyl.

In an embodiment, the at least one fatty acid may comprise a mixture ofat least two (2) fatty acids, such that the long chain ketone preparedaccording to Scheme 1 may comprise a mixture of at least three (3)different long chain ketones, and the long chain secondary alcoholprepared according to Scheme 2 may similarly comprise a mixture of atleast three (3) different long chain secondary alcohols.

In an embodiment, the selective ketone hydrogenation catalyst will lackcatalytic activity for dehydration of the long chain secondary alcoholunder the selective ketone hydrogenation conditions used such that,during the step of contacting the long chain ketone with the selectiveketone hydrogenation catalyst, ketone conversion to the correspondingalkene or alkane is prevented or hindered. As a result, thecorresponding secondary alcohol may be obtained from the long chainketone with excellent selectivity (e.g., >80% selectivity at 90%conversion).

In an embodiment, a process for preparing long chain secondary alcoholsmay comprise avoiding contact of the at least one long chain ketone withalumina during the selective ketone hydrogenation step. For example,alumina promotes alcohol dehydration to alkenes, which may in turn beconverted to alkanes during conventional hydrogenation, therebysubstantially or greatly decreasing the yield of long chain secondaryalcohols. Accordingly in an embodiment, the selective ketonehydrogenation catalyst as disclosed herein may be prepared without theuse of alumina. In an embodiment, alumina or other material(s) thatpromote(s) alcohol dehydration may be specifically excluded from theselective ketone hydrogenation catalyst and the ketone hydrogenationzone.

In an embodiment, the selective ketone hydrogenation catalyst maycomprise a metal selected from Pt, Pd, Ru, Ni, Co, Mo, Cr, Cu, Rh, andcombinations thereof. In an embodiment, the hydrogenation catalyst mayfurther comprise a support material selected from carbon, silica,magnesia, titania, and combinations thereof. In a sub-embodiment, thehydrogenation catalyst may comprise a metal selected from the groupconsisting of Pt, Pd, and combinations thereof, and a support materialselected from carbon, silica, magnesia, titania, and combinationsthereof.

In an embodiment, the ketone hydrogenation step may be performed in theabsence of a material that promotes dehydration of the long chainsecondary alcohol under the selective ketone hydrogenation conditionsused, so as to prevent or hinder ketone conversion to the correspondingalkene or alkane, in order to greatly increase the selectivity of ketoneconversion to the long chain secondary alcohol product. As anon-limiting example, the selective ketone hydrogenation step may beperformed in the absence of alumina. Alumina is used as a catalystsupport in conventional hydrotreating catalysts; however, processes asdisclosed herein may involve avoiding the presence of alumina duringketone hydrogenation for the production of long chain secondaryalcohols. In an embodiment, alumina may be avoided during the ketonehydrogenation step by using a selective ketone hydrogenation catalystthat lacks an alumina component. Selective ketone hydrogenationcatalysts that lack alumina are described hereinabove.

In an embodiment, the selectivity of long chain ketone conversion to thecorresponding long chain secondary alcohol via the selective ketonehydrogenation step (e.g., according to Scheme 2) may be much higher,e.g., typically at least about 15% higher, than that of comparableketone hydrogenation in the presence of a conventional hydrotreatingcatalyst comprising alumina. As a non-limiting example, the selectivityof ketone conversion to the corresponding long chain secondary alcoholby a selective ketone hydrogenation catalyst as disclosed herein may begreater than (>) 80% at 90% conversion, whereas the selectivity ofketone conversion to the corresponding long chain secondary alcohol by aconventional hydrogenation catalyst comprising an alumina support istypically less than (<) 70% at 90% conversion.

In an embodiment, R₁ and R₂ in Schemes 1 and 2 may each be linear orbranched alkyl. In a sub-embodiment, R₁ and R₂ may be independentlyselected from C₅-C₂₁ linear or branched alkyl, or from C₇-C₁₇ linear orbranched alkyl, or from C₉-C₁₇ linear or branched alkyl, or from C₉-C₁₅linear or branched alkyl, or from C₁₅-C₁₇ linear or branched alkyl. Inan embodiment, the at least one long chain secondary alcohol formed byketone hydrogenation, e.g., according to Scheme 2, may be in the rangefrom C₁₁-C₄₃, or from C₂₁-C₃₁, or from C₃₁-C₃₅. In an embodiment, longchain secondary alcohols prepared by processes as disclosed herein maycomprise a mixture of long chain secondary alcohols, e.g., each havingfrom 11 to 43 carbon atoms per molecule. In an embodiment, each of thelong chain secondary alcohols may have the hydroxyl group placed at anon-terminal location of the molecule. In a further embodiment, a longchain secondary alcohol prepared according to embodiments of processesdisclosed herein may have the OH group placed at- or near the center ofthe secondary alcohol molecule.

In an embodiment, fatty acid ketonization may comprise contacting amixture of at least two (2) fatty acids with the ketonization catalystin the ketonization zone. In an embodiment, such a mixture of fattyacids may comprise a lipid mixture derived from a source of lipidsselected from a plant, an animal, or other organism(s). Such sources oflipids may include, without limitation, terrestrial plants, mammals,microorganisms, aquatic plants, seaweed, algae, phytoplankton, and thelike. In an embodiment, a mixture of fatty acids for ketonizationaccording to processes as disclosed herein may be derived from palmkernel oil, palm oil, coconut oil, corn oil, soy bean oil, rape seed(canola) oil, poultry fat, beef tallow, and the like and theirrespective fatty acid constituents, and combinations thereof.

In another embodiment, a process for preparing a long chain secondaryalcohol may comprise reacting a first fatty acid with a second fattyacid to form a long chain ketone, and selectively hydrogenating the longchain ketone to selectively form the corresponding secondary alcohol.

In an embodiment, the selectively hydrogenating step may comprisecontacting the long chain ketone with a selective ketone hydrogenationcatalyst in a ketone hydrogenation zone under selective ketonehydrogenation conditions. In an embodiment, the selective ketonehydrogenation catalyst will lack catalytic activity for dehydration ofthe secondary alcohol, under the selective ketone hydrogenationconditions used, such that ketone conversion to the corresponding alkeneor alkane is prevented. Due to the relatively low reactivity of longchain ketones (e.g., C₁₁-C₄₃) in the ketone hydrogenation reaction, ascompared with lighter ketones (e.g., C₃ or C₄), the more forcingconditions used for the long chain ketones would exacerbate the negativeeffect that a hydrogenation catalyst having dehydration functionalitywould have on product selectivity. Instead, the use of a selectiveketone hydrogenation catalyst that at least substantially lacksdehydration activity, as disclosed herein, allows for the efficientconversion of long chain ketones with high selectivity to thecorresponding long chain secondary alcohols.

In an embodiment, exemplary conditions for selective ketonehydrogenation may comprise a temperature in the range from 200 to 755°F. (93 to 402° C.), or from 355 to 755° F. (179 to 402° C.), or from 400to 750° F. (204 to 399° C.), a pressure in the range from 200 to 5000psi, or from 250 to 5000 psi, or from 300 to 4000 psi, a liquid hourlyspace velocity (LHSV) in the range from 0.05 to 5.0 h⁻¹, or from 0.1 to5.0 h⁻¹, or from 0.5 to 4.0 h⁻¹, and a hydrogen to feed molar ratio inthe range from 1.0 to 1000, or from 5.0 to 1000, or from 10 to 1000. Inan embodiment, the hydrogenation catalyst may comprise a metal selectedfrom the group consisting of Pt, Pd, Ru, Ni, Co, Mo, Cr, Cu, Rh, andcombinations thereof. In a sub-embodiment, the metal may be selectedfrom Pt, Pd, and combinations thereof.

As described hereinabove, the selective hydrogenation of long chainketones may be performed in the absence of a material that promotesdehydration of the secondary alcohol under selective ketonehydrogenation conditions, such that conversion to the correspondingalkene or alkane is prevented or hindered. Accordingly, the selectiveketone hydrogenation catalyst will lack a material, such as alumina,that promotes dehydration of the secondary alcohol under said selectiveketone hydrogenation conditions. This is in contrast to conventionalhydrotreating catalysts having an alumina support that promotes alcoholdehydration to alkenes, with subsequent hydrogenation to alkanes.Advantageously, selective ketone hydrogenation as disclosed hereinallows the corresponding secondary alcohol to be obtained efficientlywith excellent selectivity.

In an embodiment, long chain secondary alcohol product(s) prepared asdisclosed herein may comprise a mixture of long chain secondary alcoholsand may be subjected to various separation processes. Such separationmay involve, for example, distilling and/or flash distillation toprovide one or more long chain secondary alcohol products.

Long Chain Ethers Prepared from Long Chain Secondary Alcohols

In an embodiment, a process for preparing a long chain ether maycomprise providing a long chain ketone, e.g., via fatty acidketonization as described hereinabove according to Scheme 1, supra, andthereafter contacting the long chain ketone with a selective ketonehydrogenation catalyst under selective ketone hydrogenation conditions,e.g., as described hereinabove, to provide a first long chain secondaryalcohol according to the following Scheme 2:

wherein R₁ and R₂ are the same or different, when R₁ is alkyl R₁′═R₁,when R₂ is alkyl R₂′═R₂, when R₁ is alkenyl R₁′ is alkyl or alkenyl,when R₂ is alkenyl R₂′ is alkyl or alkenyl, R₁ and R₁′ have an equalnumber of carbon atoms, and R₂ and R₂′ have an equal number of carbonatoms. In an embodiment, R₁′ and R₂′ may be independently selected fromthe group consisting of C₅-C₂₁ linear or branched alkyl and C₅-C₂₁linear or branched alkenyl. Thereafter, the first long chain secondaryalcohol may be reacted with a second alcohol or an olefin to form a longchain ether.

Catalysts and conditions for fatty acid ketonization and long chainketone selective hydrogenation are described, e.g., hereinabove. In anembodiment, the at least one fatty acid for the ketonization reaction(Scheme 1, supra) may comprise a mixture of at least two (2) fattyacids, and the long chain ether (e.g., as represented by general FormulaI, infra) may comprise a mixture of at least three (3) long chainethers. In an embodiment, a long chain ether prepared as disclosedherein may be in the range from C₂₆-C₈₆, or from C₃₅-C₈₆, or fromC₃₅-C₇₀.

As noted hereinabove, in an embodiment the long chain ether may beprepared by reacting the first long chain secondary alcohol with asecond alcohol. In an embodiment, the step of reacting the first longchain secondary alcohol with the second alcohol may comprise contactingthe first long chain secondary alcohol with the second alcohol in thepresence of an acidic catalyst. Non-limiting examples of acidiccatalysts that may be used when reacting the long chain secondaryalcohol with a second alcohol include: sulfuric acid, phosphoric acid,fluorosulfonic acid, perfluoro alkane sulfonic acids, methanesulfonicacid, toluenesulfonic acid, and acidic ion exchange resins such asAmberlyst® 15 or Nafion®, as well as solid acid catalysts such as acidiczeolites, sulfated zirconia and tungstated zirconia.

Suitable conditions for reacting the first long chain secondary alcoholwith the second alcohol may vary, for example, depending on the catalystand the reactants. Typically the reaction conditions may include atemperature in the range from 100 to 350° C., or from 120 to 200° C.,and a pressure in the range from 0.01 psi to 500 psi, or fromatmospheric pressure to 100 psi. In an embodiment, the reaction may beconducted under conditions that allow for the removal of liberated waterby azeotropic distillation.

In an embodiment, the second alcohol may be a primary alcohol, and thestep of reacting the first long chain secondary alcohol with the secondalcohol may be according to the following Scheme 3:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl, and R₃ is selectedfrom C₁-C₂₂ linear or branched alkyl and C₂-C₂₂ linear or branchedalkenyl. In an embodiment, the second alcohol may be a C₁-C₂₂ primaryalcohol. In a sub-embodiment, the second alcohol may be a short chainalcohol, such as methanol. ethanol, or n-propanol.

In an embodiment, the second alcohol may be a second secondary alcohol,and the step of reacting the first long chain secondary alcohol with thesecond alcohol may be according to the following Scheme 4:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl, wherein R₄ and R₅are independently selected from C₁-C₂₁ linear or branched alkyl andC₂-C₂₁ linear or branched alkenyl, and R₄ and R₅ are the same ordifferent.

In an embodiment, the second alcohol may be a second long chainsecondary alcohol prepared according to the fatty acid ketonization andlong chain ketone hydrogenation steps as described, e.g., with referenceto Schemes 1 and 2, for the preparation of the first long chainsecondary alcohol. In another embodiment, the second alcohol may be ashort chain alcohol, such as isopropanol.

According to another embodiment, a long chain ether may be prepared byreacting a long chain secondary alcohol with an olefin according to thefollowing Scheme 5:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl; R₆ is selectedfrom C₁-C₄₀ linear or branched alkyl; R₇, R₈, and R₉ are independentlyselected from a hydrogen atom and C₁-C₂₁ linear or branched alkyl; andR₇, R₈, and R₉ are the same or different. In an embodiment, R₆ may bethe same as at least one of R₇, R₈, and R₉. Typically, R₆ will bedifferent from one or more of R₇, R₈, and R₉. In a sub-embodiment, R₆may be selected from C₁-C₄₀ linear or branched alkyl and R₇ may be ahydrogen atom.

In an embodiment, the step of reacting a long chain secondary alcoholwith an olefin may comprise contacting the long chain secondary alcoholwith the olefin in the presence of an acidic catalyst. Non-limitingexamples of acidic catalysts that may be used when reacting the longchain secondary alcohol with an olefin include: sulfuric acid,phosphoric acid, fluorosulfonic acid, perfluoro alkane sulfonic acids,methanesulfonic acid, toluenesulfonic acid, and acidic ion exchangeresins such as Amberlyst® 15 or Nafion®, as well as solid acid catalystssuch as acidic zeolites, sulfated zirconia and tungstated zirconia.

Suitable conditions for reacting the first long chain secondary alcoholwith the olefin may vary, for example, depending on the catalyst and thereactants. Typically the reaction conditions may include a temperaturein the range from 100 to 350° C., or from 150 to 250° C., and a pressurein the range from atmospheric pressure to 500 psi.

In an embodiment, the long chain secondary alcohol in Scheme 5 may beprepared by fatty acid ketonization and long chain ketone selectivehydrogenation, e.g., as described with reference to Schemes 1 and 2,supra.

In an embodiment, the olefin in Scheme 5 may be a tertiary olefin. Inanother embodiment, the olefin in Scheme 5 may be a secondary olefin. Inan embodiment, the olefin can be either internal or terminal (alphaolefin). In a sub-embodiment, the olefin may be a non-conjugated diene.In an embodiment, the olefin may be in the range from C₄-C₁₀, or fromC₄-C₅. Non-limiting examples of olefins that may be used in Scheme 5include isobutene and isopentenes.

In another embodiment, the olefin in Scheme 5 may be an olefin oligomer.In an embodiment, such an olefin oligomer may be prepared from amaterial selected from C₃-C₅ olefins and combinations thereof. In anembodiment, the olefin oligomer may have from 6 to 50 carbon atoms, orfrom 9 to 50 carbon atoms. In an embodiment, the olefin may be apropylene oligomer.

A process for preparing a long chain ether according to anotherembodiment may comprise providing a long chain secondary alcohol. In anembodiment, the long chain secondary alcohol may itself be prepared byproviding a long chain ketone, e.g., as described hereinabove accordingto Scheme 1, supra; and contacting the long chain ketone with aselective ketone hydrogenation catalyst under selective ketonehydrogenation conditions, e.g., as described hereinabove according toScheme 2.

Thereafter, the long chain secondary alcohol, or a long chain alkoxidecorresponding to the long chain secondary alcohol, may be reacted withan alkyl halide to form a long chain ether according to the followingScheme 6:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl, wherein R₃ isselected from C₁-C₂₂ linear or branched alkyl and C₂-C₂₂ linear orbranched alkenyl, and X is a halogen atom. In an embodiment, thereaction of the long chain secondary alcohol, or the correspondingalkoxide, with the alkyl halide may be performed in the presence of abase.

In an embodiment, such process may comprise converting (deprotonating)the long chain secondary alcohol (e.g., Scheme 6) to the correspondinglong chain alkoxide; and thereafter the long chain alkoxide may bereacted with the alkyl halide, e.g., essentially according to Scheme 6.In an embodiment, the corresponding long chain alkoxide may be in theform of an alkali metal alcoholate. In an embodiment, the deprotonationreaction to produce the alkali metal alcoholate from the correspondingalcohol may be performed either by reacting the alcohol with a strongbase, such as sodium hydride or sodium isopropoxide or potassiumtert-butoxide, or with an alkali metal, such as sodium or potassium.

In an embodiment, a long chain ether prepared according to Scheme 6 maybe in the range from C₂₆-C₈₆, or from C₃₅-C₈₆, or from C₃₅-C₇₀. In anembodiment, a long chain ether product prepared according to processesas disclosed herein may comprise a mixture of two or more long chainethers.

According to a further embodiment of a process for preparing a longchain ether from a first long chain secondary alcohol, the first longchain secondary alcohol may itself be prepared from a long chain ketone,wherein the long chain ketone may be prepared e.g., as describedhereinabove according to Scheme 1, supra, and the long chain ketone maybe contacted with a selective ketone hydrogenation catalyst underselective ketone hydrogenation conditions to provide the first longchain secondary alcohol, e.g., as described hereinabove according toScheme 2, supra. Thereafter, the first long chain secondary alcohol maybe reacted with a halogenating agent to form a halide derivative of thefirst long chain secondary alcohol; and the halide derivative of thefirst long chain secondary alcohol may be reacted with a second alcohol,or with an alkoxide corresponding to the second alcohol, to form a longchain ether according to the following Scheme 7:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl, wherein R₄ and R₅are independently selected from C₁-C₂₁ linear or branched alkyl andC₂-C₂₁ linear or branched alkenyl.

Non-limiting examples of halogenating agents for forming the halidederivative of the long chain secondary alcohol include hydrogen halide,HX, wherein X is selected from Cl, Br, and I) and thionyl halide, SOX₂,wherein X is selected from Cl and Br. The halogenation may be performedin the absence of a catalyst or in the presence of a catalyst. Forthionyl halide, such catalyst may be a weak base such as pyridine. Forthe HX addition, anhydrous ZnX₂ or CaX₂ will in some cases promote thereplacement of the alcohol group with the halide.

In an embodiment, the halide derivative of the first long chainsecondary alcohol may be reacted with the alkoxide corresponding to thesecond alcohol. In an embodiment, the second alcohol may be a shortchain alcohol, such as isopropanol. In another embodiment, the secondalcohol may comprise a second long chain secondary alcohol. In asub-embodiment, the second long chain secondary alcohol may be preparedaccording to Schemes 1 and 2, supra. In an embodiment, a long chainether prepared according to Scheme 7 may be in the range from C₂₆-C₈₆,or from C₃₅-C₈₆, or from C₃₅-C₇₀. In an embodiment, long chain etherproducts prepared according to Scheme 7 may be in the bright stockrange.

According to another embodiment, there is provided a compositioncomprising a long chain ether of general Formula I:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl, wherein R₁′ andR₂′ are the same or different, and R is selected from linear or branchedalkyl having up to 52 carbon atoms and linear or branched alkenyl havingup to 52 carbon atoms.

In an embodiment of a composition according to general Formula I, R₁′and R₂′ may be independently selected from C₅-C₂₁ linear or branchedalkyl. In a sub-embodiment of a composition according to general FormulaI, R₁′ and R₂′ may be independently selected from C₇-C₁₇ linear orbranched alkyl.

In another embodiment of a composition according to general Formula I, Rmay be selected from C₁-C₂₂ linear or branched alkyl and C₂-C₂₂ linearor branched alkenyl. In a sub-embodiment, R may be selected from C₁-C₂₂linear alkyl, or from C₁-C₁₂ linear alkyl, or from C₁-C₆ linear alkyl.

In an embodiment of a composition according to general Formula I, R mayhave partial structure II:

wherein R₄ and R₅ are independently selected from C₁-C₂₁ linear orbranched alkyl and C₂-C₂₁ linear or branched alkenyl, and wherein R₄ andR₅ may be the same or different.

In another embodiment of a composition according to general Formula I, Rmay have partial structure III:

wherein R₆ may be selected from C₁-C₄₀ linear or branched alkyl, andwherein R₇, R₈, and R₉ are independently selected from a hydrogen atomand C₁-C₂₂ linear or branched alkyl.

With further reference to structure III, in an embodiment R₆, R₇, R₈,and R₉ may jointly contain from 3 to 50 carbon atoms. In an embodiment,a long chain ether of general Formula I may be in the range fromC₂₆-C₈₆, or from C₃₅-C₈₆, or from C₃₅-C₇₀.

In an embodiment, a long chain ether of general Formula I may have aViscosity Index greater than (>) 120, or in the range from 120 to 150.In an embodiment, the long chain ether composition disclosed herein maycomprise a mixture of at least two different long chain ether compoundsof general Formula I. Such a mixture of long chain ethers of generalFormula I may exhibit improved cold flow properties, in comparison withindividual component ethers of such a mixture.

According to another embodiment, there is provided a compositioncomprising a long chain ether of general Formula IV:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl, wherein R₁′ andR₂′ are the same or different, and wherein R₄ and R₅ are independentlyselected from C₁-C₂₁ linear or branched alkyl and C₂-C₂₁ linear orbranched alkenyl, and R₄ and R₅ are the same or different.

With further reference to Formula IV, in a sub-embodiment R₁′ and R₂′may be independently selected from C₅-C₂₁ linear or branched alkyl. Inanother sub-embodiment, R₁′ and R₂′ may be independently selected fromC₇-C₁₇ linear or branched alkyl. In yet another sub-embodiment, R₄ andR₅ may be independently selected from C₇-C₁₇ linear or branched alkyl.In an embodiment, a long chain ether of general Formula IV may have aViscosity Index greater than (>) 120, or in the range from 120 to 150.

According to a further embodiment, there is provided a compositioncomprising a long chain ether of general Formula V:

wherein R₁′ and R₂′ may be independently selected from C₅-C₂₁ linear orbranched alkyl and C₅-C₂₁ linear or branched alkenyl, and wherein R₁′and R₂′ are the same or different, wherein R₆ is selected from C₁-C₄₀linear or branched alkyl, and R₇, R₈, and R₉ are independently selectedfrom a hydrogen atom and C₁-C₂₂ linear or branched alkyl. In anembodiment, R₆ may be the same as at least one of R₇, R₈, and R₉.Typically, R₆ will be different from one or more of R₇, R₈, and R₉. In asub-embodiment, R₆ may be selected from C₁-C₄₀ linear or branched alkyland R₇ may be a hydrogen atom.

With further reference to Formula V, in a sub-embodiment R₁′ and R₂′ maybe independently selected from C₅-C₂₁ linear or branched alkyl. Inanother sub-embodiment, R₁′ and R₂′ may be independently selected fromC₇-C₁₇ linear or branched alkyl. In an embodiment, R₆, R₇, R₈, and R₉may jointly contain from 3 to 50 carbon atoms. In an embodiment, a longchain ether of general Formula V may have a Viscosity Index greater than(>) 120, or in the range from 120 to 150.

In an embodiment, the long chain ether(s) prepared as disclosed hereinmay comprise a mixture of two or more long chain ether compounds. In anembodiment, long chain ether product(s) prepared as disclosed herein,e.g., comprising a mixture of long chain ethers, may be subjected tovarious separation processes. Such separation may involve, for example,distilling and/or flash distillation to provide one or more long chainether products.

Distilling

In an embodiment, a step of distilling may employ one or moredistillation columns to separate the desired product(s) fromby-products. In an embodiment, the step of distilling may employ flashdistillation or partial condensation techniques to remove by-productsincluding at least low molecular weight materials. Those of skill in theart will recognize that there is some flexibility in characterizing thehigh and low boiling fractions, and that the products may be obtainedfrom “cuts” at various temperature ranges.

EXAMPLES Example 1 Ketonization of Lauric Acid to Laurone Using AluminaCatalyst

The ketonization of lauric acid to 12-tricosanone (laurone) wascatalyzed by an alumina catalyst operated in a fixed bed continuouslyfed reactor at ambient pressure, at a temperature range of 770-840° C.,and with a feed rate that gave a liquid hourly space velocity (LHSV) of0.62-0.64 h⁻¹. The conversion rate of lauric acid to laurone wascalculated based on the composition of the product as determined by GCanalysis using an FID detector.

The freshly loaded new alumina catalyst was calcined in the reactor at900° F. (482° C.) with a stream of dry nitrogen (2 volumes of nitrogenper volume of catalyst per minute) for 2 hours before the temperaturewas lowered to 770° F. (410° C.), nitrogen was turned off and the lauricacid feed was introduced. Product composition analysis showed that thefresh catalyst operating at 770° F., LHSV=0.62-0.64 h⁻¹, gave a lauricacid conversion of 62-66%.

Example 2 Hydrogenation of 12-tricosanone to 12-tricosanol Over aPt/Carbon Hydrogenation Catalyst

12-tricosanone (Example 1) was hydrogenated over a carbon supportedplatinum catalyst to make the corresponding alcohol, 12-tricosanol, asfollows. 12-tricosanone was introduced as a liquid flow (4.1-4.4 g/hr,12-13 mmoles/hr) together with hydrogen (100 Nml/min, 250 mmoles/hr) toa fixed reactor holding 7 ml of 0.5% Pt/carbon (3.5 g, particle size:0.3-1 mm). The pressure was held at 1500 psi. The liquid products werecollected after the reaction and analyzed by GC. The liquid productstream was found to contain three components: unconverted 12-tricosanoneand two products: the target alcohol, 12-tricosanol, and thecorresponding n-alkane, n-tricosane, of which the latter was presentonly in trace amounts.

At 450-470° F. reaction temperature the GC analysis of the productshowed a conversion of 12-tricosanone of 80-87% and a selectivity to12-tricosanol of 98.9-99.4% with the remaining 0.6-1.1% beingn-tricosane formed by hydro-deoxygenation of the alcohol.

Example 3 Preparation of 12-tricosanyl n-butyl ether

40.3 g (0.118 mole) 12-tricosanol (Example 2) was heated with 3.0 g(0.13 mole, 10% molar excess) sodium metal to 130° C. for a period of 15hrs during which most of the sodium dissolved with hydrogen evolution toform the corresponding alkoxide, sodium 12-tricosanolate, which isliquid at 130° C. The thus prepared sodium 12-tricosanolate wassubsequently treated with 20 ml (0.19 mole, 60% molar excess) n-butylchloride in the presence of 20 ml THF at 90° C. for 7 days. Theresulting reaction mixture was quenched with aqueous sodium hydroxideand extracted with heptane. The heptane solution was cooled to 20° F.during which 8.9 g of solid precipitate (unconverted 12-tricosanol and12-tricosanone) formed and was removed. The heptane was evaporated at80° C., 10 torr to yield the 12-tricosanyl n-butyl ether (33.2 g) as acolorless oil having the following properties: VI=147, VIS100=2.768 cSt,VIS40=9.395, cloud point: −3° C., pour point: −4° C.

Example 4 Preparation of 12-tricosanyl sec-butyl ether

12-tricosanyl sec-butyl ether was prepared from sodium 12-tricosanolateusing a procedure analogous to that of Example 3. The properties of thethus prepared 12-tricosanyl sec-butyl ether were as follows: VI=130,VIS100=2.874 cSt, VIS40=10.36 cSt. (Cloud point and pour point were notmeasure but the product freezes around −2° C.)

Example 5 Preparation of 12-tricosanyl n-octyl ether

12-tricosanyl n-octyl ether was prepared from sodium 12-tricosanolateusing a procedure analogous to that of Example 3. The properties of thethus prepared 12-tricosanyl n-octyl ether were as follows: VI=148,VIS100=3.247 cSt, VIS40=11.89 cSt, Pour point=−14° C., cloud point=−4°C.

The reaction of sodium metal with a long chain secondary alcohol, suchas 12-tricosanol and heavier, may typically be relatively slow even at atemperature of about 130° C. A faster way to make a long chain sodiumalcoholate is by reaction of the long chain alcohol with a solution ofan alcoholate of a lighter secondary or tertiary alcohol to form thecorresponding long chain alkoxide and the lighter alcohol; the lighteralcohol may then be subsequently removed by evaporation. Thus,12-tricosanolate may be made by treating 12-tricosanol with a solutionof 1 equivalent of sodium isopropylate in anhydrous isopropanol to formsodium 12-tricosanolate, as described in Example 6, infra. The sodium12-tricosanolate may be subsequently reacted with an alkyl halide toform a long chain ether as described hereinabove.

Example 6 Preparation of Sodium 12-tricosanolate Using SodiumIsopropanolate in Isopropanol Solution

3.1 g (0.135 mole) sodium metal was dissolved in 40 ml isopropanol underreflux conditions for 4 hrs to make a solution of sodium isopropanolatein isopropanol. 47 g (0.138 mole) 12-tricosanol was added and theresulting isopropanol was subsequently evaporated by heating to 170-180°C. for 2 hrs to yield the sodium 12-tricosanolate for further reaction.

For the purposes of this specification and appended claims, unlessotherwise indicated, all numbers expressing quantities, percentages orproportions, and other numerical values used in the specification andclaims, are to be understood as being modified in all instances by theterm “about.” Furthermore, all ranges disclosed herein are inclusive ofthe endpoints and are independently combinable. Whenever a numericalrange with a lower limit and an upper limit are disclosed, any numberfalling within the range is also specifically disclosed. Additionally,chemical species including reactants and products designated by anumerical range of carbon atoms include any one or more of, or anycombination of, or all of the chemical species within that range.

Any term, abbreviation or shorthand not defined is understood to havethe ordinary meaning used by a person skilled in the art at the time theapplication is filed. The singular forms “a,” “an,” and “the,” includeplural references unless expressly and unequivocally limited to oneinstance. All publications, patents, and patent applications cited inthis application are incorporated by reference herein in their entiretyto the extent not inconsistent herewith.

Modifications of the exemplary embodiments disclosed above may beapparent to those skilled in the art in light of this disclosure.Accordingly, the invention is to be construed as including all structureand methods that fall within the scope of the appended claims. Unlessotherwise specified, the recitation of a genus of elements, materials orother components, from which an individual component or mixture ofcomponents can be selected, is intended to include all possiblesub-generic combinations of the listed components and mixtures thereof.

What is claimed is:
 1. A composition, comprising: a long chain ether ofgeneral Formula I:

wherein: R₁′ and R₂′ are independently selected from the groupconsisting of C₅-C₂₁ linear or branched alkyl and C₅-C₂₁ linear orbranched alkenyl, and R₁′ and R₂′ are the same or different, and R isselected from the group consisting of linear or branched alkyl having upto 52 carbon atoms and linear or branched alkenyl having up to 52 carbonatoms.
 2. The composition according to claim 1, wherein R₁′ and R₂′ areindependently selected from the group consisting of C₅-C₂₁ linear orbranched alkyl.
 3. The composition according to claim 1, wherein R₁′ andR₂′ are independently selected from the group consisting of C₇-C₁₇linear or branched alkyl.
 4. The composition according to claim 1,wherein R is selected from the group consisting of C₁-C₂₂ linear orbranched alkyl and C₂-C₂₂ linear or branched alkenyl.
 5. The compositionaccording to claim 2, wherein R has partial structure II:

wherein R₄ and R₅ are independently selected from the group consistingof C₁-C₂₁ linear or branched alkyl and C₂-C₂₁ linear or branchedalkenyl, and R₄ and R₅ are the same or different.
 6. The compositionaccording to claim 2, wherein R has partial structure III:

wherein: R₆ is selected from the group consisting of C₁-C₄₀ linear orbranched alkyl, and R₇, R₈, and R₉ are independently selected from thegroup consisting of a hydrogen atom and C₁-C₂₂ linear or branched alkyl.7. The composition according to claim 6, wherein R₆, R₇, R₈, and R₉jointly contain from 3 to 50 carbon atoms.
 8. The composition accordingto claim 1, wherein the long chain ether is in the range from C₂₆-C₈₆.9. The composition according to claim 1, wherein the long chain etherhas a Viscosity Index greater than (>)
 120. 10. The compositionaccording to claim 1, comprising a mixture of at least two differentlong chain ether compounds of general Formula I.
 11. A composition,comprising: a long chain ether of general Formula IV:

wherein: R₁′ and R₂′ are independently selected from the groupconsisting of C₅-C₂₁ linear or branched alkyl and C₅-C₂₁ linear orbranched alkenyl, and R₁′ and R₂′ are the same or different, R₄ and R₅are independently selected from the group consisting of C₁-C₂₁ linear orbranched alkyl and C₂-C₂₁ linear or branched alkenyl, and R₄ and R₅ arethe same or different.
 12. The composition according to claim 11,wherein R₁′ and R₂′ are independently selected from the group consistingof C₅-C₂₁ linear or branched alkyl.
 13. The composition according toclaim 11, wherein R₁′ and R₂′ are independently selected from the groupconsisting of C₇-C₁₇ linear or branched alkyl.
 14. The compositionaccording to claim 13, wherein R₄ and R₅ are independently selected fromthe group consisting of C₇-C₁₇ linear or branched alkyl.
 15. Thecomposition according to claim 11, wherein the long chain ether has aViscosity Index greater than (>)
 120. 16. A composition, comprising: along chain ether of general Formula V:

wherein: R₁′ and R₂′ are independently selected from the groupconsisting of C₅-C₂₁ linear or branched alkyl and C₅-C₂₁ linear orbranched alkenyl, and R₁′ and R₂′ are the same or different, R₆ isselected from the group consisting of C₁-C₄₀ linear or branched alkyl,and R₇, R₈, and R₉ are independently selected from the group consistingof a hydrogen atom and C₁-C₂₂ linear or branched alkyl.
 17. Thecomposition according to claim 16, wherein R₁′ and R₂′ are independentlyselected from the group consisting of C₅-C₂₁ linear or branched alkyl.18. The composition according to claim 16, wherein R₁′ and R₂′ areindependently selected from the group consisting of C₇-C₁₇ linear orbranched alkyl.
 19. The composition according to claim 17, wherein R₆,R₇, R₈, and R₉ jointly contain from 3 to 50 carbon atoms.
 20. Thecomposition according to claim 16, wherein the long chain ether has aViscosity Index greater than (>) 120.